I used this book in a summer school university course "Statistical methods for Natural Scientists". Many tables, many methods presented for analyzing data such as determining which data points are true outliers or should be kept, confidence intervals, just to name a minute portion of the realm of this book.
I may not be remembering correctly, it was 45 years ago, but I think this book was a landmark for statistics and introduced new methods and compiled existing methods into one reference book that made the field of statistics more complete and accesible.